<template>
    <el-container class="home_container">
        <!--  头部区域-->
        <el-header>
            <div>
                <img src="../assets/homelogo.png" alt="">
                <span>商品后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        
        <!-- 页面主体区域 -->
        <el-container>
            <!-- 侧边栏 -->
            <el-aside :width="isCollapse ? '64px' : '200px'">
                <!-- 折叠侧边栏菜单的按钮 -->
                <div class="toggle-button" @click="toggleCollapse">
                    |||
                </div>
                <!-- 侧边栏菜单 -->
    <el-menu unique-opened :collapse="isCollapse" :collapse-transition="false"
     router :default-active="activePath"
      background-color="#333744"
      text-color="#fff"
      active-text-color="#409eff">
        <!-- 一级菜单 -->
      <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
        <template slot="title">
          <i :class="iconsObject[item.id]"></i>
          <span>{{item.authName}}</span>
        </template>
        
        <!-- 二级菜单 -->
        <el-menu-item :index="'/'+subItem.path+''" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
            <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{subItem.authName}}</span>
            </template>
        </el-menu-item>
      </el-submenu>
    </el-menu>
            </el-aside>
            <!-- 右侧主体 -->
            <el-main>
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>


<script>
export default {
    data(){
        return{
            //左侧菜单数据
            menulist: [],
            iconsObject: {
                '125': 'iconfont icon-yonghuguanli',
                '103': 'iconfont icon-quanxian',
                '101': 'iconfont icon-shangpinguanli',
                '102': 'iconfont icon-icon-dingdan',
                '145': 'iconfont icon-baobiaoguanli'
            },
            isCollapse: false,
            //被激活的链接的地址
            activePath: ''
        }
    },
    created(){
        this.getMenuList()
        this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods: {
        logout(){
            //清空token 并 跳转到登录页
            window.sessionStorage.clear();
            this.$router.push("/login");
        },
        //获取所有菜单
        async getMenuList(){
            const { data: res } = await this.$http.get('menus')
            if(res.meta.status!== 200) return this.$message.console.error(res.meta.msg);
            this.menulist = res.data
            console.log(res)
        },
        //点击按钮切换菜单的折叠效果
        toggleCollapse(){
            this.isCollapse = ! this.isCollapse
        },
        //保存链接的激活状态
        saveNavState(activePath) {
            window.sessionStorage.setItem('activePath',activePath)//键值对
            this.activePath = activePath
       }
    }
};
</script>

<style scoped>
.home_container{
    height: 100%;
}
.el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
}
.el-header div{
    display: flex;
    align-items: center;
}
.el-header span{
    margin-left: 15px;
}
.el-aside{
    background-color: #333744;
}
.el-aside .el-menu{
    border-right: none;
}
.el-main{
    background-color: #eaedf1;
}
.iconfont{
    margin-right: 10px;
}
.toggle-button{
    background-color: #4a5064;
    font-size: 10px;
    line-height: 25px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>
